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    <h2 style="text-align: center;">产品月销量</h2>
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            <td style="width:500px;text-align: center;">ID</td> 
            <td style="text-align: center;">产品名称</td>
            <td  style="text-align: center;">销量</td>
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            <td style="width:500px;text-align: center;">2021090901</td> 
            <td style="text-align: center;">马克杯</td>
            <td style="text-align: center;">5000</td>
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            <td style="width:500px;text-align: center;">2021090901</td> 
            <td style="text-align: center;">啤酒杯</td>
            <td style="text-align: center;">5200</td>
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            <td style="width:500px;text-align: center;">2021090901</td> 
            <td style="text-align: center;">搪瓷杯</td>
            <td style="text-align: center;">3500</td>
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            <td colspan="2">合计</td> 
            <td style="text-align: center;">13700</td>
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